The file /var/local/odbc/DDODBC.DAT is being created/accessed on some (not all) servers when the database is accessed via Perl dbi:ODBC.
I did a full crawl through /var/local/odbc on a server that does create the file and a server that does not, and everything is identical (md5sum) save for the existence of that file. There is no difference in the environment and the odbc.ini and odbcinst.ini files are also the same.
I'm currently at a loss. I'm interested because this file caused a db issue that was resolved by force-removing this file.